American alligators are large aquatic reptiles with strong jaws, armor-like bodies and muscular tails.

Bears are powerful, majestic animals who face numerous threats.

Named for their stubby tails, bobcats are so elusive that you’d be lucky to catch a glimpse of one in your lifetime.

Cats bring joy and companionship to millions of people. Here's how you can take care of them.

Chinchillas are small rodents native to South America who live in large colonies.

Dogs are the canine companions who have shared our lives for millennia.

Sensitive, intelligent elephants are the world’s largest land mammal (by weight) and a living link to long-extinct species like the woolly mammoth.

Ferrets are playful, curious carnivores who have become popular pets.

Giraffes are gentle giants.

Combine a bulbous snout with a prominent jaw, a body like a beer keg set on four stubby legs, and you have a hippopotamus.

They look like a deer crossed with a giant jack rabbit; with long, muscular tails and belly pouches, kangaroos are the world’s largest marsupial.

African lions are stunning and iconic creatures in danger of extinction.

Mink are semi-aquatic mammals similar in appearance to weasels and ferrets.

Whether you call them mountain lions or cougars, they’re one of the most adaptable big cats in the Western Hemisphere.

Depending on pack ice for their habitat, polar bears are threatened by climate change—and by traffic in their fur and parts.

One of the largest living land mammals, rhinoceroses once shared the earth with saber-toothed cats and the earliest humanlike apes.

Sheep are complex and intelligent animals.

Tigers are the largest cat species, with striped coat patterns as unique as fingerprints.

Social, family-oriented and highly adaptable—wolves have a lot in common with humans.

Zebras are striped, horse-like mammals that live across Africa.